Oil-well jack.



2 Sheets-$haet 2.

(No Windel.)

RICHARD 1V. HUDSON, OF TOLEDO, OHIO, ASSIGNOR OF ONE-THIRD TO THE KIRKMANUFACTURING COMPANY, OF SAME PLACE.

OlLwVt/ELL JACK.

SPECIFICATION forming part of Letters Patent No. 660,059` dated October16, 1900. Application filed March 3, 1900I Serial No. 7,150. (No model.)

To ft2/Z whom it may concern,.- the jack. The frame 4 is formed inhinged Beit known that l, RICHARD W. HUDSON, sections 5, 6, and 7,respectively. Sections of Toledo, count-y of Lucas, and State of Ohio, 5and 6 are hinged together by the pin 3,which have invented certain newand useful lrnpasses through transverse perforationsinthe 55 5provements in OilVell Jacks; andldo hereends thereof. Section 6 isflattened at its by declare that the following is a full, clear, lowerend, which portion is formed with equiand exact description oftheinvention, which distant perforations 8 to receive a bolt 9 for willenable others skilled in the art to which pivotally connecting thesurface rod 10 thereit appertains to make and use the same, refto andfor the purpose of adjusting the length 6o ro erence being had to theaccompanying drawof the pump-strole. Bolt 9 also secures the ings, andto the figures of reference marked lower end of section 7 to section (i.Section thereon, which form part of this specification. 7 is form ed atits upper end with a bifurcated My invention has reference to apumpingcasting 1l, divided at 12 to permit the unobjack for pumpingoil-wells, and has for its structed movement of the polish-rod 13. 65 I5object to provide a jack of simple and inex- 14 is a bolt which passesthrough the cast pensive construction for reciprocating the ing 11 at 15and also the perforation 16 in the polish rod and the pumprods suspendedend of section 5 of the frame and serves to therefrom. couple thesections 5 and 7 together when the It has furtherforits object toprovide means jack is in operation. The polish-rod 13 is 7o zo forsuspending the polish-rod, whereby the suspended by means of a collar17, having1 usual lateral strain upon the rod is avoided. the lowerbearing points or surfaces 18 and I further provide a simple means forrethe lower inclined faces 19. The collar 17 is moving the working partsof the jack from secured to the polish-rod by a set-screw 20. vproximity to the polish-rod without the usual The bearing-points 18 fitinto recesses 2O'Y on 75 necessity of disconnecting the surface rod. theupper side of the cradle 21, which is di- In carrying outtheforegoingand such other vided at 22 to permit the free movement of.objects as may hereinafter appear my inventhe polish-rod while the jackis in operation tion consists in the construction and the parts and alsoto permit the removal of the hanger and combination of parts hereinaftershown, from the rod. The lower side of cradle 21 is 8o 3o described, andclaimed. arc-shaped, with the axis of the arc trans- In the drawings,Figure 1 is an elevation verse to the cradle coincident with the centerof my jack, a portion of one of the standards of the bearing-surfaces18. On the sides of which support the jack being cut away. Fig. thecradle are shouldered bolts 23 for pivot- 2 is a front elevation of thehanger for susally attaching the cradle 2l to straps 24, 85 pending thepolislrrod. Fig. 3 is a detail in through the lower ends of which thebolts 23 perspective of the cradle which forms the pass.

lower portion of the hanger. Fig. 4 is a detail 25 represents shoulderedbolts on the proin perspective of the collar which is secured to jectingends of the casting 11 for pivotally atthe polish-rod and which when thejack is in taching thc upper ends of straps 211. 9o 4o operation restsupon the cradle shown in Fig. 26 is a pin passing through the rear endof '3. Fig. 5 is a sectional elevation showing the the cradle 2l andalso a strap 27, which strap relation of the cradle and the collar shownin is hinged at its upper end to the casting 11 Figs. 3 and 4,respectively. Fig. 6 shows the by a pin 2S passing therethrough.

jack disconnected and removed from prox 29 is an ordinary collar securedto the pol- 95 imity tothe polish-rod when the well is to be ish-rod bymeans of a set-screw 30. By suspulled. pending the polish-rod on bothsides of the Referring to the drawings, 1 designates the axial linethere isan easy movement of the usual base or platform built around awell, rod and no tendency to the usual lateral to which are secureduprights or standards 2, strain. When it is desired to pull the well,roo

5o which have fulcrumed at their upper ends by the collar 29 is lowereduntil it rests upon means of a transverse pin 3 the frame 4 of thestuffing-box 31. As the polish-rod moves upward it is secured at thehighest point of its movement by tightening the set-screw 30 in collar29. The cradle 2l is then released from the polish-rod, bolt let iswithdrawn, and section 5 thrown backward, section '7 being made toassume an elevated position,as shown in Fig. 6. Section 7 may be lashedin this position or secured by means of a hooked ineinber, as shown at32. The jack when folded up will continue to ro'ck backward for-V Ward,but will in no Way interfere With those engaged in pulling the well.

therein without departing from the spirit of The employment of myimproved jack effects an appreciable saving in the time required to pulla well. Where other pumping' rigs in present use are employed, theinitial Operation in polliner e well is to deteeh the surface rod fromthe jack. This necessitates the employment of a power-brake, or theengine which. furnishes power for pumping ,a number of wells must beshut down.' The jack is then lifted after the surface rod. is detachedand swung in its entirety npon its vsupe porting-frame to remove it fromproximity t0 the polish-red- Tbis operation requires ofen.- siderable tiine and labor.

From the description of myinventien it will loey seen that the necessityef deteehing the surferoe rod is overcome, the Werking perfs of thejacket ere. easily removed proximity to the polish-rode@ there is egreat saving of time end e, 'eonsidereble ref duetion in the cost- .Ofpumping e Well. i

I have illustrated End, deseribed the, preferred details .ofconsti-notion; lout it is evi; dent that. Changes which. would.suggestthemselves to the ordinary meehenie eeh be made my invention:For instance, it is evident that the frame may be disconnected at anysuitable point. I may desire to form a hinged jointintermediate of thelength of either section 5, 6, or 7, in which case the frame would befolded together Without the necessity of removing the bolt 14.

What I claim, and desire to secure by Letters Patent, is- A 1n apumping-jack the three-part frame suitably supported upon standards, thesurface rod connected therewith, hinges formed at two angular points ofthe trame, and means for disconnecting the frame at a third point, abifllrctted extension on the frame having an inwardly-extending recess,acradle formed with En inwardly-extending recess, straps pivotellyett'frohed. to the `forward sides of the cradle and to the forward sidesof the bifureeitedy extension, e `strep pivotelly attached to the rearof the cradle and else to the rear of the bifnreeted extension, .Ereciprocating Polish-rod edepted to oeeupy the recesses in the eredleand the bitume/ted. extension, e coller Qn, Said polish-rod havinglowerbearing-points adapted] to tit into recesses in. the 'top of the eredlewhereby the working nerfs of the .ieek ere, espeble of being removedfrom proXlmity te the. Apolishfrm. .substantially as End for the purposeset forthf,

lli tetlllQlly lll? I. Claim the foregoing as own l Efik mysigneture inpresence of tyre WitnessesP RICHARD W. HUDSON.

Witnesses= CARL KELLER, SAMUEL RHOADES.

